
class MyRunnable implements Runnable {

    @Override
    public void run() {
        while(true) {
            System.out.println("hello runnable!");
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
        }
    }
}


public class Demo2 {
    public static void main(String[] args) throws InterruptedException {
        MyRunnable myRunnable = new MyRunnable();
        Thread thread = new Thread(myRunnable);
        thread.start();

        while(true) {
            System.out.println("hello main!");
            Thread.sleep(1000);
        }
    }
}
